Roller carriage assembly for use with a road surface finishing machine
CA 1280927 C · Owner: E. H. Hughes Co. Inc. · Inventors: Anderson, Roger K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A roller carriage assembly for a road surface finishing machine of the type having an elongated main frame is disclosed. The assembly features a vibrating drum or roller wherein rotating eccentric weights used to generate vibrations can be rotated at speeds which are independent of the speed of roller rotation to thus permit the finishing of extremely low slump concrete. The assembly employs a scissors extender system which permits rapid and precise changes in the level of the roller relative to the main frame without affecting the attitude of the former relative to the latter. The scissors extender system is locked in place by a rotating locking mechanism and is rigidified by the use of …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted March 5, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 5, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.